Superior Electrochemical Performance of WNb2O8 Nanorods Triggered by Ultra‐Efficient Li+ Diffusion,ChemistrySelect

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Superior Electrochemical Performance of WNb2O8 Nanorods Triggered by Ultra‐Efficient Li+ Diffusion
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-01-21 , DOI: 10.1002/slct.201904220
Zhuren Zhou ₁ , Shuaifeng Lou ₁ , Xinqun Cheng ₁ , Binghan Cui ₁ , Wei Si ₁ , Fei Ding ₂ , Yulin Ma ₁ , Pengjian Zuo ₁ , Chunyu Du ₁ , Jiajun Wang ₁ , Geping Yin ₁

Affiliation

Advanced anode materials with high rate performance and high safety are greatly desired for power lithium ion batteries. Herein, one‐dimensional WNb₂O₈ is synthesized via a simple solution method with succeeding thermal calcining, and is first employed as an anode material for power lithium ion batteries. WNb₂O₈ nanorods with diameters of 100–200 nm reveal a reversible capacity of 229.2 mAh g⁻¹ with high initial coulombic efficiency of 92 % at 0.2 C. WNb₂O₈ nanorods also possess high rate performance (150.7 mAh g⁻¹ at 10 C) and cycling stability (keeping 85.2 % of the initial capacity after 500 cycles at 5 C). Moreover, the calculation results prove that the intercalation pseudocapacitance, which is promoted by ultrahigh lithium ion diffusion efficiency, plays a significant role in the fast charge/discharge processes.

中文翻译：

超高效Li +扩散引发的WNb2O8纳米棒的卓越电化学性能

功率锂离子电池非常需要具有高倍率性能和高安全性的先进阳极材料。在此，一维WNb ₂ O ₈通过简单的固溶方法合成并进行了热煅烧，首先被用作动力锂离子电池的负极材料。WNB ₂ ö ₈纳米棒的直径为100-200纳米揭示229.2毫安g的可逆容量^-1以0.2C WNB为92％的高的初始库仑效率_2个ö ₈纳米棒还具有高倍率性能（150.7毫安克^-1在10 C下）和循环稳定性（在5 C下500次循环后，保持初始容量的85.2％）。此外，计算结果证明，超高锂离子扩散效率所促进的插层伪电容在快速充电/放电过程中起着重要作用。

更新日期：2020-01-22

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